I have found the term tinnitus unhelpful because it means 'ringing in your ears' and that can be caused by all kinds of things. It's like 'pain in your leg' - it could be anything, some worse than others.
I understand that some tinnitus is permanent, that is if the tiny hairs in your ears are damaged via loud noise
Others such as the type I've got is manageable and frankly can just go in time, I've found. It was brought on when I went on the Atkins diet a decade or more ago - it was high protein and generally unhealthy, if done with a drink in the evening. Some tinnitus is brought on with flu and I felt rundown and unhealthy - I would walk up two flights of stairs in my flatshare and feel knackered and really really thirsty, I could down two or three pints of water. I think this was trying to flush it out of my system. At the time I thought at first the noise was ringing water pipes.
I handled it - and I guess this isn't official advice - with a Neurofen before bed which I modified to two Paracetamol. Obv stick to two Paracetamol maximum, don't think if you have more it will make it better, you will just damage yourself. Don't do this if you are already on Lemsip, which is Paracetamol anyway. It seemed to be unnoticeable during the day but the noise emerged only as I went to bed. Partly because of the silence at that time but also because your body temperature rises and so any latent infection picks up the pace then. Hence, the Paracetamol is meant to reduce your body temperature. The tinnitus might also intensify briefly as you lie down, it may affect your body's state or balance or something.
Back then I would play some light ambient music on Vol 2 or about that on the CD player across the room, it just externalises things so you are not hearing the slight ringing sound, there is something out there instead.
I think the tinnitus may also have been brought on by getting the flu jab when I was at a low ebb and not ill but not tip top. This occurred to me last year also - I got it when I was not ill exactly but had a few bugs in the system - and I didn't get the flu jab this year - this is just a personal thing however and I am in no way anti-vac.
The tinnitus website when I looked at it years ago said the condition was permanent but while it is for some, I got the impression they were saying that to raise funds for research, I found it really off-putting to say the least.
Mine did disappear, it flared up in the last year however but is manageable. Eggs and cheese are triggers to avoid, I found, along with alcohol (the stronger the worse, I was drinking port a decade ago, I must have been nuts) and caffeine - I am on decaf these days and that's fine, esp with milk. Intense high protein, perhaps is to be avoided.
Excess ear wax may be a thing, there are other threads on its removal.